Ahya Khoirunisa Acwa. “Marketing and Service Strategy in an Effort to Improve the Quality of Competition at the Hajj and Umrah Travel Agency at PT. Qiblatain Ama Tour”. Demagogi: Journal of Social Sciences, Economics and Education 4, no. 1 (February 18, 2026): 13–21. Accessed August 26, 2026. http://www.demagogi.com/index.php/i/article/view/192.